Development Of Software For Composition And Dynamic Deviation Correction Of Universal Segments For Shield Tunnel

As a sophisticated tunnel lining type, the universal segments can do a good job in control of the axis of shield-driven tunnels, so it is applied widely in the construction of the shield-driven tunnels. Composition and deviation correction of the universal segments are important subjects in the construction of the shield-driven tunnels, the proper selection of segments erection attitudes influences the quality of tunnel axis deviation control. This thesis mainly takes research on design composition and dynamic deviation correction of universal segments. The conclusions are summarized as the following:1. Through refined prediction of three-dimension system of coordinates according to the designed parameters of the line, circle and transition curve, which are commonly used in designed tunnel axis, the calculation equations of three-dimension system of coordinates of each curve are obtained. It proves that the accuracy of this method meets the challenge of actual engineering.2. Through refined prediction of three-dimension system of coordinates of universal segments ring according to its physical dimensions, the calculation equations of three-dimension system of coordinates of universal segments ring are obtained. It proves that the deviation of curve fitting far less than deviation control requirements of tunnel axis fitting if this method is adopted.3. The software realized the generation of engineering data base of the tunnel, which makes opreration easier for technologists. 4. The program adopted the least squares method to optimize ring's attitudes selection following the principle that deviation of tunnel axis fitting is minimized. The flow process about how to choose the optimal erecting attitude is programmed. The optimal design composition of uiniversal segments is realized. The curve plotting of design composition result is realized, which visualizes design composition result.5. The flow process about dynamic deviation correction is programmed utilizing the least squares method and the exhaustion method, according to general optimizational principle. The monitoring data of erected segment rings and shield tail space are considered at the same time. The optimal composition scheme of the next deviation correction rings are obtained, the predicted scheme can provide guidelines for the construction of tunnels.6. The composition and deviation correction software of universal segments for shield tunnel was programmed uing Visual Basic. Combining with the DTA of Shanghai South Xizang Road Through-river Tunnel and universal segments, realized the design composition of both west tunnel and east tuunel, and the result of dynamic deviation correction is reasonable in the process of the tunnel construction.